Add the `enable-*-resolver` flags to the Pipeline controller customization docs
Add the `enable-*-resolver` flags to the Pipeline controller customization docs

Prompted by https://github.com/tektoncd/pipeline/pull/5415#discussion_r961027785

Signed-off-by: Andrew Bayer <584a3be2b8e7a970b37393618731e9be5df24fde@gmail.com>

tektoncd/pipeline,tektoncd/pipeline